Despite these troubles, Carson was still able to raise almost $23 million in the final three months of 2015.

His campaign announced Bob Dees, a retired Army major general, would be campaign chairman while Ed Brookover, formerly a senior strategist, would serve as campaign manager.

Carson’s campaign has courted controversy due to a number of ill-informed statements made by the Republican candidate.

In October he compared abortion to slavery.

"I know that's one of those words you're not supposed to say, but I'm saying it," Carson began. "During slavery, a lot of slave-owners thought they had the right to do whatever they wanted to that slave, anything that they chose. And what if the abolitionists had said, 'I don't believe in slavery, but you guys do whatever you want'? Where would we be?"

Carson also came under criticism for remarks he made regarding the Holocaust and gun control.

He told CNN “I think the likelihood of Hitler being able to accomplish his goals would have been greatly diminished if the people had been armed. I’m telling you there is a reason these dictatorial people take guns first.”